api-review

A read-only review procedure for HTTP API design, including routes, endpoints, methods, status codes, idempotency, validation, and error responses. It treats the API as a contract that other software depends on.

In plain words
What is it for?
Use it when reviewing an API change or pull request. It helps assess resource structure, HTTP method semantics, response codes, input validation, authorization-related errors, and security concerns.
Why use it?
It finds API designs that are confusing, unsafe, or inconsistent with HTTP behavior. It also checks validation and whether error messages reveal internal details or protected information.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/pekral/cursor-rules/api-review
Any agent
npx skills add pekral/cursor-rules --skill api-review
Clone the repo
git clone --depth 1 https://github.com/pekral/cursor-rules

Made for: Claude Code, Codex.

Per session 66 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,904 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00066 $0.01904
Opus 5 $0.00033 $0.00952
Sonnet 5 $0.00013 $0.00381
Haiku 4.5 $0.00007 $0.00190

Measured 2d ago against content hash ad376ce358b0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

api-review scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/api-review/SKILL.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Constraints

  • Apply @rules/api/general.mdc — this skill is the focused review lens for that rule.
  • Apply @rules/php/core-standards.mdc
  • Apply @rules/security/backend.md — for the error-text and authorization-leak surface of API responses (401/403/404 wording, no internal-detail leak).
  • If the current project uses Laravel, also apply @rules/laravel/architecture.mdc and @rules/laravel/laravel.mdc — validation belongs in FormRequest / Data Validator, controllers stay slim.
  • Apply @rules/reports/general.mdc — when the findings are folded into the GitHub PR comment by a CR wrapper they stay in canonical English per the rule's Exception — technical CR findings on the GitHub PR; a non-technical mirror on a linked issue / JIRA ticket follows the language of the source assignment. HTTP verbs, status codes, header names, and code identifiers stay verbatim regardless of the surrounding prose language.
  • Output findings only — no praise, no summary of what was checked.
  • Read-only skill — never modify code, never stage / commit / push, and never run any git write operation. Switching to the relevant branch and git pull to read the latest diff are allowed; mutating the working tree or pushing is not.

Use when

  • A PR or change set adds or modifies HTTP endpoints, routes, controllers, API Resources, request/response payloads, or status-code handling.
  • Run as part of every code review via @skills/code-review/SKILL.md (Specialized Reviews → Always run).
  • A consumer-facing API contract needs a design check before release.

Scope

Review only the API surface on the diff — never untouched endpoints. Detect the surface from any of: route definitions, controller/__invoke request handlers, API Resources / DTOs serialized into responses, FormRequests, response() / abort() / status-code calls, and Idempotency-Key handling. If the diff touches no API surface, return no findings.

Core Checks

Walk the diff against each pillar of @rules/api/general.mdc and raise one finding per match.

Read the full file on GitHub · 93 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 93 lines · 66 tokens per session scan A ad376ce358b0

Subscribe to this mod's changes

api-review is a skill published in the GitHub repository pekral/cursor-rules (6 stars, last pushed 8d ago), licensed MIT. It adds 66 tokens to every session and 1,904 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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